2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/xattr.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/lm_interface.h>
17 #include <asm/uaccess.h>
33 * ea_calc_size - returns the acutal number of bytes the request will take up
34 * (not counting any unstuffed data blocks)
39 * Returns: 1 if the EA should be stuffed
42 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
45 *size = GFS2_EAREQ_SIZE_STUFFED(er);
46 if (*size <= sdp->sd_jbsize)
49 *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
54 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
58 if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
61 ea_calc_size(sdp, er, &size);
63 /* This can only happen with 512 byte blocks */
64 if (size > sdp->sd_jbsize)
70 typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
71 struct gfs2_ea_header *ea,
72 struct gfs2_ea_header *prev, void *private);
74 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
75 ea_call_t ea_call, void *data)
77 struct gfs2_ea_header *ea, *prev = NULL;
80 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
83 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
84 if (!GFS2_EA_REC_LEN(ea))
86 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
87 bh->b_data + bh->b_size))
89 if (!GFS2_EATYPE_VALID(ea->ea_type))
92 error = ea_call(ip, bh, ea, prev, data);
96 if (GFS2_EA_IS_LAST(ea)) {
97 if ((char *)GFS2_EA2NEXT(ea) !=
98 bh->b_data + bh->b_size)
107 gfs2_consist_inode(ip);
111 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
113 struct buffer_head *bh, *eabh;
117 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &bh);
121 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
122 error = ea_foreach_i(ip, bh, ea_call, data);
126 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
131 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
132 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
134 for (; eablk < end; eablk++) {
139 bn = be64_to_cpu(*eablk);
141 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
144 error = ea_foreach_i(ip, eabh, ea_call, data);
155 struct gfs2_ea_request *ef_er;
156 struct gfs2_ea_location *ef_el;
159 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
160 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
163 struct ea_find *ef = private;
164 struct gfs2_ea_request *er = ef->ef_er;
166 if (ea->ea_type == GFS2_EATYPE_UNUSED)
169 if (ea->ea_type == er->er_type) {
170 if (ea->ea_name_len == er->er_name_len &&
171 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
172 struct gfs2_ea_location *el = ef->ef_el;
184 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
185 struct gfs2_ea_location *el)
193 memset(el, 0, sizeof(struct gfs2_ea_location));
195 error = ea_foreach(ip, ea_find_i, &ef);
203 * ea_dealloc_unstuffed -
210 * Take advantage of the fact that all unstuffed blocks are
211 * allocated from the same RG. But watch, this may not always
217 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
218 struct gfs2_ea_header *ea,
219 struct gfs2_ea_header *prev, void *private)
221 int *leave = private;
222 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
223 struct gfs2_rgrpd *rgd;
224 struct gfs2_holder rg_gh;
225 struct buffer_head *dibh;
229 unsigned int blen = 0;
230 unsigned int blks = 0;
234 if (GFS2_EA_IS_STUFFED(ea))
237 dataptrs = GFS2_EA2DATAPTRS(ea);
238 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
241 bn = be64_to_cpu(*dataptrs);
247 rgd = gfs2_blk2rgrpd(sdp, bn);
249 gfs2_consist_inode(ip);
253 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
257 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
258 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
262 gfs2_trans_add_bh(ip->i_gl, bh, 1);
264 dataptrs = GFS2_EA2DATAPTRS(ea);
265 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
268 bn = be64_to_cpu(*dataptrs);
270 if (bstart + blen == bn)
274 gfs2_free_meta(ip, bstart, blen);
280 if (!ip->i_di.di_blocks)
281 gfs2_consist_inode(ip);
282 ip->i_di.di_blocks--;
283 gfs2_set_inode_blocks(&ip->i_inode);
286 gfs2_free_meta(ip, bstart, blen);
288 if (prev && !leave) {
291 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
292 prev->ea_rec_len = cpu_to_be32(len);
294 if (GFS2_EA_IS_LAST(ea))
295 prev->ea_flags |= GFS2_EAFLAG_LAST;
297 ea->ea_type = GFS2_EATYPE_UNUSED;
301 error = gfs2_meta_inode_buffer(ip, &dibh);
303 ip->i_inode.i_ctime = CURRENT_TIME;
304 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
305 gfs2_dinode_out(ip, dibh->b_data);
312 gfs2_glock_dq_uninit(&rg_gh);
316 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
317 struct gfs2_ea_header *ea,
318 struct gfs2_ea_header *prev, int leave)
320 struct gfs2_alloc *al;
323 al = gfs2_alloc_get(ip);
325 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
329 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
333 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
335 gfs2_glock_dq_uninit(&al->al_ri_gh);
338 gfs2_quota_unhold(ip);
345 struct gfs2_ea_request *ei_er;
346 unsigned int ei_size;
349 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
350 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
353 struct ea_list *ei = private;
354 struct gfs2_ea_request *er = ei->ei_er;
355 unsigned int ea_size = gfs2_ea_strlen(ea);
357 if (ea->ea_type == GFS2_EATYPE_UNUSED)
360 if (er->er_data_len) {
365 if (ei->ei_size + ea_size > er->er_data_len)
368 switch (ea->ea_type) {
369 case GFS2_EATYPE_USR:
373 case GFS2_EATYPE_SYS:
377 case GFS2_EATYPE_SECURITY:
378 prefix = "security.";
385 memcpy(er->er_data + ei->ei_size, prefix, l);
386 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
388 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
391 ei->ei_size += ea_size;
401 * Returns: actual size of data on success, -errno on error
404 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
406 struct gfs2_holder i_gh;
409 if (!er->er_data || !er->er_data_len) {
414 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
418 if (ip->i_di.di_eattr) {
419 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
421 error = ea_foreach(ip, ea_list_i, &ei);
426 gfs2_glock_dq_uninit(&i_gh);
432 * ea_get_unstuffed - actually copies the unstuffed data into the
434 * @ip: The GFS2 inode
435 * @ea: The extended attribute header structure
436 * @data: The data to be copied
441 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
444 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
445 struct buffer_head **bh;
446 unsigned int amount = GFS2_EA_DATA_LEN(ea);
447 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
448 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
452 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
456 for (x = 0; x < nptrs; x++) {
457 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
467 for (x = 0; x < nptrs; x++) {
468 error = gfs2_meta_wait(sdp, bh[x]);
470 for (; x < nptrs; x++)
474 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
475 for (; x < nptrs; x++)
481 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
482 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
484 amount -= sdp->sd_jbsize;
485 data += sdp->sd_jbsize;
495 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
498 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
499 memcpy(data, GFS2_EA2DATA(el->el_ea), GFS2_EA_DATA_LEN(el->el_ea));
502 return ea_get_unstuffed(ip, el->el_ea, data);
507 * @ip: The GFS2 inode
508 * @er: The request structure
510 * Returns: actual size of data on success, -errno on error
513 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
515 struct gfs2_ea_location el;
518 if (!ip->i_di.di_eattr)
521 error = gfs2_ea_find(ip, er, &el);
527 if (er->er_data_len) {
528 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
531 error = gfs2_ea_get_copy(ip, &el, er->er_data);
534 error = GFS2_EA_DATA_LEN(el.el_ea);
543 * @ip: The GFS2 inode
544 * @er: The request structure
546 * Returns: actual size of data on success, -errno on error
549 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
551 struct gfs2_holder i_gh;
554 if (!er->er_name_len ||
555 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
557 if (!er->er_data || !er->er_data_len) {
562 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
566 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
568 gfs2_glock_dq_uninit(&i_gh);
574 * ea_alloc_blk - allocates a new block for extended attributes.
575 * @ip: A pointer to the inode that's getting extended attributes
576 * @bhp: Pointer to pointer to a struct buffer_head
581 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
583 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
584 struct gfs2_ea_header *ea;
587 block = gfs2_alloc_meta(ip);
589 *bhp = gfs2_meta_new(ip->i_gl, block);
590 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
591 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
592 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
594 ea = GFS2_EA_BH2FIRST(*bhp);
595 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
596 ea->ea_type = GFS2_EATYPE_UNUSED;
597 ea->ea_flags = GFS2_EAFLAG_LAST;
600 ip->i_di.di_blocks++;
601 gfs2_set_inode_blocks(&ip->i_inode);
607 * ea_write - writes the request info to an ea, creating new blocks if
609 * @ip: inode that is being modified
610 * @ea: the location of the new ea in a block
611 * @er: the write request
613 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
618 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
619 struct gfs2_ea_request *er)
621 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
623 ea->ea_data_len = cpu_to_be32(er->er_data_len);
624 ea->ea_name_len = er->er_name_len;
625 ea->ea_type = er->er_type;
628 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
630 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
632 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
634 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
635 const char *data = er->er_data;
636 unsigned int data_len = er->er_data_len;
640 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
641 for (x = 0; x < ea->ea_num_ptrs; x++) {
642 struct buffer_head *bh;
644 int mh_size = sizeof(struct gfs2_meta_header);
646 block = gfs2_alloc_meta(ip);
648 bh = gfs2_meta_new(ip->i_gl, block);
649 gfs2_trans_add_bh(ip->i_gl, bh, 1);
650 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
652 ip->i_di.di_blocks++;
653 gfs2_set_inode_blocks(&ip->i_inode);
655 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
657 memcpy(bh->b_data + mh_size, data, copy);
658 if (copy < sdp->sd_jbsize)
659 memset(bh->b_data + mh_size + copy, 0,
660 sdp->sd_jbsize - copy);
662 *dataptr++ = cpu_to_be64(bh->b_blocknr);
669 gfs2_assert_withdraw(sdp, !data_len);
675 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
676 struct gfs2_ea_request *er, void *private);
678 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
680 ea_skeleton_call_t skeleton_call, void *private)
682 struct gfs2_alloc *al;
683 struct buffer_head *dibh;
686 al = gfs2_alloc_get(ip);
688 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
692 error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
696 al->al_requested = blks;
698 error = gfs2_inplace_reserve(ip);
702 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
703 blks + al->al_rgd->rd_length +
704 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
708 error = skeleton_call(ip, er, private);
712 error = gfs2_meta_inode_buffer(ip, &dibh);
714 if (er->er_flags & GFS2_ERF_MODE) {
715 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
716 (ip->i_inode.i_mode & S_IFMT) ==
717 (er->er_mode & S_IFMT));
718 ip->i_inode.i_mode = er->er_mode;
720 ip->i_inode.i_ctime = CURRENT_TIME;
721 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
722 gfs2_dinode_out(ip, dibh->b_data);
727 gfs2_trans_end(GFS2_SB(&ip->i_inode));
729 gfs2_inplace_release(ip);
731 gfs2_quota_unlock(ip);
737 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
740 struct buffer_head *bh;
743 error = ea_alloc_blk(ip, &bh);
747 ip->i_di.di_eattr = bh->b_blocknr;
748 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
756 * ea_init - initializes a new eattr block
763 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
765 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
766 unsigned int blks = 1;
768 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
769 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
771 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
774 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
776 u32 ea_size = GFS2_EA_SIZE(ea);
777 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
779 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
780 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
782 ea->ea_rec_len = cpu_to_be32(ea_size);
783 ea->ea_flags ^= last;
785 new->ea_rec_len = cpu_to_be32(new_size);
786 new->ea_flags = last;
791 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
792 struct gfs2_ea_location *el)
794 struct gfs2_ea_header *ea = el->el_ea;
795 struct gfs2_ea_header *prev = el->el_prev;
798 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
800 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
801 ea->ea_type = GFS2_EATYPE_UNUSED;
803 } else if (GFS2_EA2NEXT(prev) != ea) {
804 prev = GFS2_EA2NEXT(prev);
805 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
808 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
809 prev->ea_rec_len = cpu_to_be32(len);
811 if (GFS2_EA_IS_LAST(ea))
812 prev->ea_flags |= GFS2_EAFLAG_LAST;
818 struct gfs2_ea_request *es_er;
819 struct gfs2_ea_location *es_el;
821 struct buffer_head *es_bh;
822 struct gfs2_ea_header *es_ea;
825 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
826 struct gfs2_ea_header *ea, struct ea_set *es)
828 struct gfs2_ea_request *er = es->es_er;
829 struct buffer_head *dibh;
832 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
836 gfs2_trans_add_bh(ip->i_gl, bh, 1);
839 ea = ea_split_ea(ea);
841 ea_write(ip, ea, er);
844 ea_set_remove_stuffed(ip, es->es_el);
846 error = gfs2_meta_inode_buffer(ip, &dibh);
850 if (er->er_flags & GFS2_ERF_MODE) {
851 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
852 (ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT));
853 ip->i_inode.i_mode = er->er_mode;
855 ip->i_inode.i_ctime = CURRENT_TIME;
856 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
857 gfs2_dinode_out(ip, dibh->b_data);
860 gfs2_trans_end(GFS2_SB(&ip->i_inode));
864 static int ea_set_simple_alloc(struct gfs2_inode *ip,
865 struct gfs2_ea_request *er, void *private)
867 struct ea_set *es = private;
868 struct gfs2_ea_header *ea = es->es_ea;
871 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
874 ea = ea_split_ea(ea);
876 error = ea_write(ip, ea, er);
881 ea_set_remove_stuffed(ip, es->es_el);
886 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
887 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
890 struct ea_set *es = private;
895 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size);
897 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
898 if (GFS2_EA_REC_LEN(ea) < size)
900 if (!GFS2_EA_IS_STUFFED(ea)) {
901 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
906 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
912 error = ea_set_simple_noalloc(ip, bh, ea, es);
920 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
921 GFS2_SB(&ip->i_inode)->sd_jbsize);
923 error = ea_alloc_skeleton(ip, es->es_er, blks,
924 ea_set_simple_alloc, es);
932 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
935 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
936 struct buffer_head *indbh, *newbh;
939 int mh_size = sizeof(struct gfs2_meta_header);
941 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
944 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT,
949 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
954 eablk = (__be64 *)(indbh->b_data + mh_size);
955 end = eablk + sdp->sd_inptrs;
957 for (; eablk < end; eablk++)
966 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
970 blk = gfs2_alloc_meta(ip);
972 indbh = gfs2_meta_new(ip->i_gl, blk);
973 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
974 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
975 gfs2_buffer_clear_tail(indbh, mh_size);
977 eablk = (__be64 *)(indbh->b_data + mh_size);
978 *eablk = cpu_to_be64(ip->i_di.di_eattr);
979 ip->i_di.di_eattr = blk;
980 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
981 ip->i_di.di_blocks++;
982 gfs2_set_inode_blocks(&ip->i_inode);
987 error = ea_alloc_blk(ip, &newbh);
991 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
992 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
998 ea_set_remove_stuffed(ip, private);
1005 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1006 struct gfs2_ea_location *el)
1009 unsigned int blks = 2;
1012 memset(&es, 0, sizeof(struct ea_set));
1016 error = ea_foreach(ip, ea_set_simple, &es);
1022 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1024 if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1025 blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1027 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1030 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1031 struct gfs2_ea_location *el)
1033 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1034 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1035 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1036 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1039 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1042 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1044 struct gfs2_ea_location el;
1047 if (!ip->i_di.di_eattr) {
1048 if (er->er_flags & XATTR_REPLACE)
1050 return ea_init(ip, er);
1053 error = gfs2_ea_find(ip, er, &el);
1058 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1064 if (!(er->er_flags & XATTR_CREATE)) {
1065 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1066 error = ea_set_i(ip, er, &el);
1067 if (!error && unstuffed)
1068 ea_set_remove_unstuffed(ip, &el);
1074 if (!(er->er_flags & XATTR_REPLACE))
1075 error = ea_set_i(ip, er, NULL);
1081 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1083 struct gfs2_holder i_gh;
1086 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1088 if (!er->er_data || !er->er_data_len) {
1090 er->er_data_len = 0;
1092 error = ea_check_size(GFS2_SB(&ip->i_inode), er);
1096 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1100 if (IS_IMMUTABLE(&ip->i_inode))
1103 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1105 gfs2_glock_dq_uninit(&i_gh);
1110 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1112 struct gfs2_ea_header *ea = el->el_ea;
1113 struct gfs2_ea_header *prev = el->el_prev;
1114 struct buffer_head *dibh;
1117 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1121 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1126 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1127 prev->ea_rec_len = cpu_to_be32(len);
1129 if (GFS2_EA_IS_LAST(ea))
1130 prev->ea_flags |= GFS2_EAFLAG_LAST;
1132 ea->ea_type = GFS2_EATYPE_UNUSED;
1134 error = gfs2_meta_inode_buffer(ip, &dibh);
1136 ip->i_inode.i_ctime = CURRENT_TIME;
1137 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1138 gfs2_dinode_out(ip, dibh->b_data);
1142 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1147 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1149 struct gfs2_ea_location el;
1152 if (!ip->i_di.di_eattr)
1155 error = gfs2_ea_find(ip, er, &el);
1161 if (GFS2_EA_IS_STUFFED(el.el_ea))
1162 error = ea_remove_stuffed(ip, &el);
1164 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1173 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1174 * @ip: pointer to the inode of the target file
1175 * @er: request information
1180 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1182 struct gfs2_holder i_gh;
1185 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1188 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1192 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
1195 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1197 gfs2_glock_dq_uninit(&i_gh);
1202 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1203 struct gfs2_ea_header *ea, char *data)
1205 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1206 struct buffer_head **bh;
1207 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1208 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1209 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1213 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1217 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1221 for (x = 0; x < nptrs; x++) {
1222 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1232 for (x = 0; x < nptrs; x++) {
1233 error = gfs2_meta_wait(sdp, bh[x]);
1235 for (; x < nptrs; x++)
1239 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1240 for (; x < nptrs; x++)
1246 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1248 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1249 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1251 amount -= sdp->sd_jbsize;
1252 data += sdp->sd_jbsize;
1262 gfs2_trans_end(sdp);
1267 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1268 struct iattr *attr, char *data)
1270 struct buffer_head *dibh;
1273 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1274 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1278 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1279 memcpy(GFS2_EA2DATA(el->el_ea), data,
1280 GFS2_EA_DATA_LEN(el->el_ea));
1282 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1287 error = gfs2_meta_inode_buffer(ip, &dibh);
1289 error = inode_setattr(&ip->i_inode, attr);
1290 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1291 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1292 gfs2_dinode_out(ip, dibh->b_data);
1296 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1301 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1303 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1304 struct gfs2_rgrp_list rlist;
1305 struct buffer_head *indbh, *dibh;
1306 __be64 *eablk, *end;
1307 unsigned int rg_blocks = 0;
1309 unsigned int blen = 0;
1310 unsigned int blks = 0;
1314 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1316 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &indbh);
1320 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1325 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1326 end = eablk + sdp->sd_inptrs;
1328 for (; eablk < end; eablk++) {
1333 bn = be64_to_cpu(*eablk);
1335 if (bstart + blen == bn)
1339 gfs2_rlist_add(sdp, &rlist, bstart);
1346 gfs2_rlist_add(sdp, &rlist, bstart);
1350 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1352 for (x = 0; x < rlist.rl_rgrps; x++) {
1353 struct gfs2_rgrpd *rgd;
1354 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1355 rg_blocks += rgd->rd_length;
1358 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1360 goto out_rlist_free;
1362 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1363 RES_STATFS + RES_QUOTA, blks);
1367 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1369 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1373 for (; eablk < end; eablk++) {
1378 bn = be64_to_cpu(*eablk);
1380 if (bstart + blen == bn)
1384 gfs2_free_meta(ip, bstart, blen);
1390 if (!ip->i_di.di_blocks)
1391 gfs2_consist_inode(ip);
1392 ip->i_di.di_blocks--;
1393 gfs2_set_inode_blocks(&ip->i_inode);
1396 gfs2_free_meta(ip, bstart, blen);
1398 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1400 error = gfs2_meta_inode_buffer(ip, &dibh);
1402 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1403 gfs2_dinode_out(ip, dibh->b_data);
1407 gfs2_trans_end(sdp);
1410 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1412 gfs2_rlist_free(&rlist);
1418 static int ea_dealloc_block(struct gfs2_inode *ip)
1420 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1421 struct gfs2_alloc *al = ip->i_alloc;
1422 struct gfs2_rgrpd *rgd;
1423 struct buffer_head *dibh;
1426 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1428 gfs2_consist_inode(ip);
1432 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1437 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1442 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1444 ip->i_di.di_eattr = 0;
1445 if (!ip->i_di.di_blocks)
1446 gfs2_consist_inode(ip);
1447 ip->i_di.di_blocks--;
1448 gfs2_set_inode_blocks(&ip->i_inode);
1450 error = gfs2_meta_inode_buffer(ip, &dibh);
1452 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1453 gfs2_dinode_out(ip, dibh->b_data);
1457 gfs2_trans_end(sdp);
1460 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1465 * gfs2_ea_dealloc - deallocate the extended attribute fork
1471 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1473 struct gfs2_alloc *al;
1476 al = gfs2_alloc_get(ip);
1478 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1482 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
1486 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1490 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1491 error = ea_dealloc_indirect(ip);
1496 error = ea_dealloc_block(ip);
1499 gfs2_glock_dq_uninit(&al->al_ri_gh);
1501 gfs2_quota_unhold(ip);